// Problem: 
// Contest: 
// URL: 
// Memory Limit: 
// Time Limit: 
// #pragma GCC optimize("Ofast")
// #pragma GCC optimize("unroll-loops")
// #pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,tune=native")
#include<bits/stdc++.h>
using namespace std;
#define int long long
inline int read(){
	int s=0,w=1;
	char ch=getchar();
	while(ch<'0'||ch>'9'){if(ch=='-')w=-1;ch=getchar();}
	while(ch>='0'&&ch<='9') s=s*10+ch-'0',ch=getchar();
	return s*w;
}
signed main()
{
	int t=1;
	cin>>t;
	while(t--)
	{
		int n;
		cin>>n;
		if(n%2==0)cout<<-1<<endl;
		else 
		{
			for(int i=1;i<=n;i+=2)
			{
				cout<<i<<" ";
			}
			for(int i=2;i<n;i+=2)
			{
				if(i!=n-1)cout<<i<<" ";
				else cout<<i<<endl;
			}
		}
	}
	return 0;
}
